TW28 - Frames extending into box Keel

[Rokhal]

Hi Folks, I am finally at the stage of installing the internal framing/bulkheads on my TW28 and I need a little guidance / clarification.

The plans seem ambiguous when it comes to the frames B - G extending all the way to the bottom of the keel. The side view in sheet #D262/3 show them all extending or having a separate bulkhead in line with the station going all the way down, in fact, it shows double thicknesses on the keel portion.

The side view in sheet E262/4 shows only the prop shaft tube forward bulkhead behind frame F going all the way to the bottom of the keel.

The nesting sheet #B262/2 does not show these frames/bulkheads.

Given that the layup on the box keel is over one inch thick and even thicker in the top and bottom corners where the tape forms the equivalent of an I beam, is it even necessary that there are bulkheads at every station that intersects with the box keel?

What are you folks building a TW28 doing in regard to this and are you doubling the thickness of the bulkheads that are extending to the bottom of the box keel?

Thanks,

Robert

[fallguy1000]

I don’t have the plans and not a TW28 builder. Bulkheads are transverse members and are not really providing the same structural support ss a box keel.

Bulkheads can be opened or holed within rules if you need the space for something.

[fallguy1000]

Maybe someone can email Rick L and see if he’d comment.

[Cowbro]

If you go back into Rick's youtube videos you can see how the frames lay out around the keel area. it looks like the frames all stop at a pair of stringers and between them in the keel are the necessary bulkheads needed to mount the prop shaft etc.



Start around ep 40, the next 5 or 6 videos show glimpses of this area.

[Rokhal]

All,

Appreciate the feedback, I will check out Rick's videos to get an idea of what he did.

Thanks,

Robert